Registration Dossier
Registration Dossier
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EC number: 200-543-5 | CAS number: 62-56-6
Auto flammability
Administrative data
Link to relevant study record(s)
- Endpoint:
- self-ignition of dust accumulation
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 2003-01-14
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- other: company guideline
- Principles of method if other than guideline:
- Deposited dust: This test determines the ignition temperature of a dry product on a hot surface. For a description of the method see "any other information on materials and methods".
- GLP compliance:
- no
- Key result
- Self-ignition temperature:
- > 240 °C
- Remarks on result:
- other: slow decomposition occured
- Conclusions:
- Melting of test substance observed from 240 °C on with slight hissing noise, foaming and smoke development (increases with increasing temperature). Thus, thiourea was categorized in BWZ 1.
- Executive summary:
The test determines the ignition temperature of a deposited dusty test substance on hot surfaces. The test is conducted according to the test protocol. The surface area of the substance is increased intentionally in this test by preparing the test substance accordingly to simulate the deposited dusty properties. The ignition temperature of deposited dusty test material is expected to be lower than the ignition temperature of the solid with larger particle diameters.
Melting of the test substance was observed from 240 °C on with slight hissing noise, foaming and smoke development (increases with increasing temperature). Thus, thiourea was categorized in BWZ 1 of 6.
Reference
Description of key information
Thiourea is non-autofammable.
Key value for chemical safety assessment
Additional information
The test determines the ignition temperature of a deposited dusty test substance on hot surfaces. The test is conducted according to the test protocol. The surface area of the substance is increased intentionally in this test by preparing the test substance accordingly to simulate the deposited dusty properties. The ignition temperature of deposited dusty test material is expected to be lower than the ignition temperature of the solid with larger particle diameters.
Melting of the test substance was observed from 240 °C on with slight hissing noise, foaming and smoke development (increases with increasing temperature). Thus, thiourea was categorized in BWZ 1.
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